scholarly journals Importance of the environment for gestational duration variability and correlation between relatives – results from the Medical Swedish Birth Registry, 1973-2012

PLoS ONE ◽  
2020 ◽  
Vol 15 (7) ◽  
pp. e0236494
Author(s):  
Dominika Modzelewska ◽  
Pol Sole-Navais ◽  
Ge Zhang ◽  
Louis J. Muglia ◽  
Staffan Nilsson ◽  
...  
Keyword(s):  
Birth Registry ◽  
Gestational Duration

scholarly journals Changes in data management contribute to temporal variation in gestational duration distribution in the Swedish Medical Birth Registry

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241911
Author(s):  
Dominika Modzelewska ◽  
Pol Sole-Navais ◽  
Anna Sandstrom ◽  
Ge Zhang ◽  
Louis J. Muglia ◽  
...  
Keyword(s):  
Public Health ◽  
Association Studies ◽  
Temporal Changes ◽  
Estimation Methods ◽  
Birth Registry ◽  
Health Measures ◽  
Medical Birth Register ◽  
Duration Distribution ◽  
Swedish Medical ◽  
Gestational Duration

Multiple factors contribute to gestational duration variability. Understanding the sources of variability allows to design better association studies and assess public health measures. Here, we aimed to assess geographical and temporal changes in the determination of gestational duration and its reporting in Sweden between 1973 and 2012. Singleton live births between 1973 and 2012 were retrieved from the Swedish Medical Birth Register. Gestational duration trends in percentiles and rates of pre- and post-term deliveries were analyzed by plotting the values over time. Temporal changes in gestational duration based on ultrasound and last menstrual period (LMP) estimation methods were compared. Intervals between LMP date and LMP-based due date were analyzed to assess changes in expected gestational duration. In total, 3 940 577 pregnancies were included. From 1973 until 1985, the median of gestational duration estimated based on LMP or ultrasound decreased from 283 to 278 days, and remained stable until 2012. The distribution was relatively stable when ultrasound-based estimates were used. Until the mid-1990s, there was a higher incidence than expected of births occurring on every seventh gestational day from day 157 onward. On an average, these gestational durations were reported 1.8 times more often than adjacent durations. Until 1989, the most common expected gestational duration was 280 days, and thereafter, it was 279 days. The expected gestational duration varied from 279 to 281 days across different Swedish counties. During leap years, the expected gestational duration was one day longer. Consequently, leap years were also associated with significantly higher preterm and lower post-term delivery rates than non-leap years. Changes in data handling and obstetrical practices over the years contribute to gestational duration variation. The resulting increase in variability might reduce precision in association studies and hamper the assessment of public health measures aimed to improve pregnancy outcomes.

Gestational Duration, and Fetal and Infant Mortality for Twins vs Singletons

Twin Research ◽  
2001 ◽  
Vol 4 (4) ◽  
pp. 227-231 ◽  
Author(s):  
Hakan Rydhstroem ◽  
Fayez Heraib
Keyword(s):  
Infant Mortality ◽  
Risk Evaluation ◽  
Preterm Births ◽  
Fetal Mortality ◽  
Birth Registry ◽  
National Board ◽  
High Incidence ◽  
Delivery Unit ◽  
Twin Pregnancies ◽  
Gestational Duration

AbstractThe aim of this research was to study fetal and infant mortality in Sweden between 1973 and 1996 in twins vs singletons in relation to gestational duration. Analysis was of fetal and infant mortality based on the number of pregnancies at risk as the denominator rather than the number of deliveries each week. The analysis was based on information stored at the Medical Birth Registry (MBR), the National Board of Health and Welfare, Stockholm. The MBR keeps records on virtually all pregnancies (> 99%) regarding delivery and neonatal information, and for infant mortality up to 1 year of age. During the study period, 2,206,738 singleton and 52,658 twin births were registered. Risk evaluation was made as odds ratio (OR) with a 95% confidence interval. The material was stratified according to parity, maternal age, year of delivery, and delivery unit. Results showed the OR for twin births before 34 weeks gestation was 6 to 8-fold increased compared with singletons. The OR for fetal mortality was increased in all gestational weeks, and like-sexed twins had a consistently poorer prognosis compared to unlike-sexed. Between 1989–96, unlike-sexed twins had a fetal mortality approaching that of singletons. In conclusion, real progress in reduction of infant mortality in twins may be impossible until the high incidence of preterm births can be decreased. Hypothetically, about 100 twin labors would have to be induced to avoid one fetal death in like-sexed twin pregnancies.

Age at Exposure to Parental Suicide and the Subsequent Risk of Suicide in Young People

Crisis ◽  
2018 ◽  
Vol 39 (1) ◽  
pp. 27-36 ◽  
Author(s):  
Kuan-Ying Lee ◽  
Chung-Yi Li ◽  
Kun-Chia Chang ◽  
Tsung-Hsueh Lu ◽  
Ying-Yeh Chen
Keyword(s):  
Young People ◽  
Proportional Hazards ◽  
Proportional Hazards Model ◽  
Cox Proportional Hazards ◽  
Cox Proportional Hazards Model ◽  
Birth Registry ◽  
Data Set ◽  
Parental Suicide ◽  
The Impact ◽  
Age At Exposure

Abstract. Background: We investigated the age at exposure to parental suicide and the risk of subsequent suicide completion in young people. The impact of parental and offspring sex was also examined. Method: Using a cohort study design, we linked Taiwan's Birth Registry (1978–1997) with Taiwan's Death Registry (1985–2009) and identified 40,249 children who had experienced maternal suicide (n = 14,431), paternal suicide (n = 26,887), or the suicide of both parents (n = 281). Each exposed child was matched to 10 children of the same sex and birth year whose parents were still alive. This yielded a total of 398,081 children for our non-exposed cohort. A Cox proportional hazards model was used to compare the suicide risk of the exposed and non-exposed groups. Results: Compared with the non-exposed group, offspring who were exposed to parental suicide were 3.91 times (95% confidence interval [CI] = 3.10–4.92 more likely to die by suicide after adjusting for baseline characteristics. The risk of suicide seemed to be lower in older male offspring (HR = 3.94, 95% CI = 2.57–6.06), but higher in older female offspring (HR = 5.30, 95% CI = 3.05–9.22). Stratified analyses based on parental sex revealed similar patterns as the combined analysis. Limitations: As only register-­based data were used, we were not able to explore the impact of variables not contained in the data set, such as the role of mental illness. Conclusion: Our findings suggest a prominent elevation in the risk of suicide among offspring who lost their parents to suicide. The risk elevation differed according to the sex of the afflicted offspring as well as to their age at exposure.

RISK FACTORS FOR SMALL FOR GESTATIONAL AGE INFANTS: A STUDY BASED ON THE ARKHANGELSK COUNTY BIRTH REGISTRY

2020 ◽  
Vol 99 (1) ◽  
pp. 32-39
Author(s):  
A.A. Usynina ◽  
◽  
G.N. Chumakova ◽  
V.A. Postoev ◽  
J.O. Odland ◽  
...  
Keyword(s):  
Risk Factors ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Birth Registry

scholarly journals The impact of diet during adolescence on the neonatal health of offspring: evidence on the importance of preconception diet. The HUNT study

2020 ◽  
pp. 1-13
Author(s):  
Wendy Van Lippevelde ◽  
Frøydis N. Vik ◽  
Andrew K. Wills ◽  
Sofia T. Strömmer ◽  
Mary E. Barker ◽  
...  
Keyword(s):  
Dietary Assessment ◽  
Sociodemographic Factors ◽  
Neonatal Outcomes ◽  
Health Study ◽  
Physical And Mental Health ◽  
Birth Registry ◽  
Meal Patterns ◽  
Dietary Choices ◽  
The Impact ◽  
The Relationship

Abstract Emerging evidence suggests that parents’ nutritional status before and at the time of conception influences the lifelong physical and mental health of their child. Yet little is known about the relationship between diet in adolescence and the health of the next generation at birth. This study examined data from Norwegian cohorts to assess the relationship between dietary patterns in adolescence and neonatal outcomes. Data from adolescents who participated in the Nord-Trøndelag Health Study (Young-HUNT) were merged with birth data for their offspring through the Medical Birth Registry of Norway. Young-HUNT1 collected data from 8980 adolescents between 1995 and 1997. Linear regression was used to assess associations between adolescents’ diet and later neonatal outcomes of their offspring adjusting for sociodemographic factors. Analyses were replicated with data from the Young-HUNT3 cohort (dietary data collected from 2006 to 2008) and combined with Young-HUNT1 for pooled analyses. In Young-HUNT1, there was evidence of associations between dietary choices, meal patterns, and neonatal outcomes, these were similar in the pooled analyses but were attenuated to the point of nonsignificance in the smaller Young-HUNT3 cohort. Overall, energy-dense food products were associated with a small detrimental impact on some neonatal outcomes, whereas healthier food choices appeared protective. Our study suggests that there are causal links between consumption of healthy and unhealthy food and meal patterns in adolescence with neonatal outcomes for offspring some years later. The effects seen are small and will require even larger studies with more state-of-the-art dietary assessment to estimate these robustly.

scholarly journals National and subnational trends of birthweight in Peru: Pooled analysis of 2,927,761 births between 2012 and 2019 from the national birth registry

2021 ◽  
pp. 100017
Author(s):  
Rodrigo M Carrillo-Larco ◽  
Kim N Cajachagua-Torres ◽  
Wilmer Cristobal Guzman-Vilca ◽  
Hugo G Quezada-Pinedo ◽  
Carla Tarazona-Meza ◽  
...  
Keyword(s):  
Pooled Analysis ◽  
Birth Registry

scholarly journals Periconceptional folic acid intake in Northwest Russia: a birth registry study

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
V A Postoev ◽  
L I Menshikova ◽  
A A Usynina ◽  
A M Grjibovski ◽  
J O Odland
Keyword(s):  
Folic Acid ◽  
Birth Defects ◽  
Birth Defect ◽  
Demographic Factors ◽  
Folic Acid Supplementation ◽  
Demographic Characteristics ◽  
Prenatal Counseling ◽  
Folic Acid Intake ◽  
Birth Registry ◽  
Socio Demographic Factors

Abstract Introduction Periconceptional use of folic acid supplementation is an evidence-based measure of birth defects prevention. The study was aimed to assess effect of periconceptual use of folic acid on birth defect prevalence in Arkhangelsk county and to investigate socio-demographic factors, which are associated with adherence to this preventive measure. Methods A registry-based study was conducted with data from the Arkhangelsk County Birth Registry for 2012-2015. The study population included 57084 pregnancies to calculate the proportion of women taking folic acid and 53340 pregnancy outcomes without missing data to analyze related socio-demographic characteristics. Results The proportion of women followed a folic acid supplementation before pregnancy was 1.3% (95% CI: 1.2-1.4), during pregnancy - 55.8% (95%CI: 54.6-56.4). Such women had less risk to deliver a newborn with any birth defects (OR = 0,84, 95%CI: 0,75 - 0,95). Considering birth defects prevalence of 38,6 per 1000 newborns in Arkhangelsk county, number needed to prevent one case of birth defect was 142,9. Based on multivariate analysis, nulliparous married women with higher education, aged 30 or more, had a higher chance to use folic acid before and during pregnancy. The history of spontaneous abortion in the mother's medical history and the first pregnancy were negatively associated with the probability of folic acid intake both before and during pregnancy. Conclusions The compliance to periconceptional intake of folic acid among women in the region was low. A level of compliance was associated with such socio-demographic factors as age, education, marital status, gravidity and parity. The findings have direct applications in improving prenatal care in Arkhangelsk county and establishing targets for prenatal counseling. Key messages A level of compliance to primary prevention of birth defects is associated with such socio-demographic factors as age, education, marital status, gravidity and parity. Prenatal counseling in terms of birth defects prevention should be based on socio-demographic characteristics of pregnant women.

Adolescent chronic pain and association to perinatal factors: Linkage of Birth Registry data with the Young-HUNT Study

2014 ◽  
Vol 19 (4) ◽  
pp. 567-575 ◽  
Author(s):  
J.M. Iversen ◽  
G.B. Hoftun ◽  
P.R. Romundstad ◽  
M. Rygg
Keyword(s):  
Chronic Pain ◽  
Registry Data ◽  
Perinatal Factors ◽  
Birth Registry ◽  
Hunt Study
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